Schweitzer Engineering Laboratories SEL-351-5 - Substation Battery Voltage Monitor; Under- and Overfrequency Elements

Date Code 20020426 Introduction and Specifications 1-17
SEL-351-5, -6, -7 Instruction Manual
Pickup Ranges (continued): 0.00–85.00 V, 0.01 V steps (positive-sequence element)
{150V inputs}
0.00–170.00 V, 0.01 V steps (positive-sequence element)
{300V inputs}
0.00–150.00 V, 0.01 V steps (various elements)
{150V inputs}
0.00–300.00 V, 0.01 V steps (various elements)
{300V inputs}
Steady-State Pickup Accuracy: ±1 V and ±5% of setting {150 V voltage inputs}
±2 V and ±5% of setting {300 V voltage inputs}
Transient Overreach: ±5% of pickup
Synchronism-Check Elements
Slip Frequency Pickup Range: 0.005–0.500 Hz, 0.001 Hz steps
Slip Frequency Pickup Accuracy: ±0.003 Hz
Phase Angle Range: 0–80°, 1° steps
Phase Angle Accuracy:
±4°
Under- and Overfrequency Elements
Pickup Range: 40.10–65.00 Hz, 0.01 Hz steps
Steady-State plus Transient Overshoot: ±0.01 Hz
Time Delay: 2.00–16,000.00 cycles, 0.25-cycle steps
Timer Accuracy: ±0.25 cycle and ±0.1% of setting
Undervoltage Frequency Element Block
Range:
12.50–150.00 V
LN
(wye) or V
LL
(open-delta)
{150 V inputs}
25.00–300.00 V
LN
(wye) or V
LL
(open-delta)
{300 V inputs}
Timers
Pickup Ranges: 0.00–999,999.00 cycles, 0.25-cycle steps
(reclosing relay and some programmable timers)
0.00–16,000.00 cycles, 0.25-cycle steps (some
programmable and other various timers)
Pickup and dropout accuracy for all timers: ±0.25 cycle and ±0.1% of setting
Substation Battery Voltage Monitor
Pickup Range: 20–300 Vdc, 1 Vdc steps
Pickup Accuracy: ±2% of setting, ±2 Vdc